EP0467749B1 - Verfahren zum Feuertauchbad-Aluminieren eines ferritischen Edelstahlbandes - Google Patents

Verfahren zum Feuertauchbad-Aluminieren eines ferritischen Edelstahlbandes Download PDF

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Publication number
EP0467749B1
EP0467749B1 EP91401890A EP91401890A EP0467749B1 EP 0467749 B1 EP0467749 B1 EP 0467749B1 EP 91401890 A EP91401890 A EP 91401890A EP 91401890 A EP91401890 A EP 91401890A EP 0467749 B1 EP0467749 B1 EP 0467749B1
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EP
European Patent Office
Prior art keywords
strip
less
atmosphere
process according
seconds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91401890A
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English (en)
French (fr)
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EP0467749A1 (de
Inventor
Eric Buscarlet
Charles Brun
Danielle Quantin
Jean-Paul Hennechart
Marc Mantel
Patrice De Veyrac
Bernard Baroux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sollac ugine Sa
Original Assignee
Ugine SA
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon

Definitions

  • the present invention relates to a process for coating aluminum by hot-dipping a strip of ferritic stainless steel.
  • EP-A-0 246 418 discloses an aluminizing process by hot dipping of a strip of ferritic stainless steel in which the strip is preheated to about 677 ° C. to clean its surface and this is heated. band above 843 ° C in a reducing atmosphere.
  • the strip is cooled in an atmosphere containing at least 95% hydrogen and then, avoiding contact with ambient air, the strip is soaked in a bath of liquid aluminum and wrung out.
  • This known method has several drawbacks.
  • preheating strongly oxidizes the surface of the strip, which leads to passing it in a hydrogen atmosphere to reduce the oxides formed on its surface.
  • This process applies in particular to the coating of pure aluminum.
  • the present invention aims to remedy these drawbacks, on the one hand by avoiding the use of a gas containing at least 95% hydrogen, and on the other hand, by making it possible to produce coatings with an aluminum alloy- silicon.
  • the ferritic stainless steel strip contains at most 25% by weight of chromium.
  • the strip of ferritic stainless steel 8 penetrates the installation through the preheating furnace 1, in which the atmosphere is a first non-oxidizing atmosphere containing less than 3% of oxygen.
  • the temperature of the strip 8 is less than 500 ° C. and preferably equal to 460 ° C., the residence time of any portion of said strip in this preheating oven is less than 60 seconds and preferably less than 45 seconds.
  • the strip 8 passes through the laboratory oven 2, then is deflected by a roller 9 to penetrate into the holding oven 3 where it circulates in staggered rows around the rollers 10.
  • the atmosphere prevailing in the laboratory oven 2 and in the holding oven 3 is constituted by a second non-oxidizing atmosphere and this atmosphere is adjusted to have, at all points, a dew point below -40 ° C. and preferably lower than -50 ° C.
  • the temperature of the strip 8 is less than 950 ° C. and preferably equal to 900 ° C., the residence time of any portion of said strip in this oven is less than 120 seconds and preferably less than 90 seconds.
  • the temperature of the strip 8 is maintained at a temperature below 950 ° C. and preferably equal to 900 ° C., the residence time of any portion of said strip in this holding oven is less than 220 seconds and preferably less than 190 seconds.
  • the strip 8 enters the cooling zone 4, then is deflected by a roller 11 to pass through the chute 5 and to plunge into the bath 6 of coating metal.
  • the strip 8 is wrung out by gas blown through the nozzles 7 and discharged.
  • the non-reactive atmosphere is composed of a mixture of nitrogen and hydrogen and the temperature of the strip is brought to a value close to the temperature of the bath 6 of coating metal, preferably included. between 660 ° C and 730 ° C.
  • the temperature of the strip 8 practically does not vary and the atmosphere of the said chute is either a mixture of nitrogen and hydrogen, or pure nitrogen.
  • the nitrogen used to make the mixture of nitrogen and hydrogen or to constitute the atmosphere of the chute 5, contains less than 20 ppm of oxygen and has a dew point below - 60 ° C.
  • the hydrogen used to make the mixture of nitrogen and hydrogen has an oxygen content of less than 10 ppm and a dew point of less than - 60 ° C.
  • the surface of the strip is not oxidized at the entrance to the cooling zone.
  • the quantity of the oxygen element detected on the surface on different steel strips having been preheated to different temperatures T in the preheating furnace 1 increases considerably when the temperature of said test strips exceeds 500 ° C.
  • the light intensity is proportional to the quantity of oxygen contained on the surface in the steel strip, the erosion time being linked to the thickness of the layer analyzed.
  • the cooling metal bath 6 is a mixture of aluminum and silicon containing up to about 11% silicon by weight.
  • a first strip of ferritic stainless steel was coated by dipping in a bath of almost pure aluminum under the following conditions: .
  • Preheating oven 1 - room temperature 814 ° C - temperature of the strip leaving the oven 437 ° C - oxygen content in the atmosphere ⁇ 2% .
  • Laboratory oven 2 and holding oven 3 - output tape temperature 857 ° C - atmosphere nitrogen 40% hydrogen 60% - Dew point -50 ° C .
  • Cooling zone 4 and chute 5 - output tape temperature 710 ° C - atmosphere Nitrogen 100% .
  • Coating bath 6 contents in aluminum 96.92% silicon 0.18% Iron 2.9%
  • the coating layer obtained has a weight per square meter of 89 g / m2 and the following composition: Silicon 1% Iron 19% Aluminum 80%
  • the ferritic stainless steel which constitutes the strip is of the Al Si 409 type and contains by weight: VS 0.01% Cr 11.5% Yes 0.5% Ti 0.2%
  • a second strip of ferritic stainless steel of the same composition as the previous one was coated by dipping in a bath containing a mixture of aluminum and silicon and under the following conditions: .
  • Preheating oven 1 - room temperature 914 ° C - strip temperature at the outlet of the oven 462 ° C - oxygen content in the atmosphere ⁇ 2% .
  • Laboratory oven 2 and holding oven 3 - output tape temperature 845 ° C - atmosphere nitrogen 40% hydrogen 60% dew point -50 ° C .
  • Cooling zone 4 and chute 5 - Outlet belt temperature 711 ° C - atmosphere nitrogen 100% .
  • Coating bath 6 contents in Aluminum 87.6% Silicon 9.1% Iron 3.3%
  • the coating layer thus obtained has a weight per square meter of 118 g / m2 and the following composition: Aluminum 86.8% Silicon 6% Iron 7.2%
  • the process according to the invention makes it possible to avoid using pure hydrogen and also makes it possible to obtain coating layers with a high silicon content having a behavior under the adhesion test better than that obtained with coatings with very low silicon content.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (12)

  1. Verfahren zur Tauchbeschichtung mit Aluminium eines Bandes (8) aus ferritischem, rostfreiem Stahl, dadurch gekennzeichnet, daß
    - das Band (8) bis auf eine Temperatur unter 500° C in einer nicht-oxidierenden ersten Atmosphäre (1) erwärmt wird,
    - das Band (8) auf eine Temperatur unter 950° in einer nicht-oxidierenden zweiten Atmosphäre (2, 3) erwärmt wird,
    - dann das Band (8) in eine bei der Beschichtungstemperatur nicht-reaktive Atmosphäre (4) geleitet wird,
    - und schließlich das Band (8) in ein Beschichtungsbad (8) getaucht wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die nicht-oxidierende erste Atmosphäre (1) weniger als 3 % Sauerstoff enthält.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die nicht-oxidierende zweite Atmosphäre einen Taupunkt unter -40° C, vorzugsweise unter -50° C, hat.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die nicht-reaktive Atmosphäre (4) Stickstoff ist.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die nicht-reaktive Atmosphäte (4) ein Gemisch Stickstoff-Wasserstoff ist.
  6. Verfahren nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß der Stickstoff weniger als 20 ppm Sauerstoff enthält und einen Taupunkt unter -60° C hat.
  7. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß der Wasserstoff weniger als 10 ppm Sauerstoff enthält und einen Taupunkt unter -60° C hat.
  8. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Verweilzeit irgendeines Abschnittes des Bandes (8) in der nicht-oxidierenden ersten Atmosphäre (1) unter 60 Sekunden und vorzugsweise unter 45 Sekunden beträgt.
  9. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die nicht-oxidierende zweite Atmosphäre in einer ersten Zone, die durch einen Laborofen (2) gebildet ist, und einer zweiten Zone, die durch einen Halteofen (3) gebildet ist, enthalten ist.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Verweilzeit irgendeines Abschnittes des Bandes (8) in dem Laborofen (2) unter 120 Sekunden und vorzugsweise unter 90 Sekunden liegt.
  11. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die verweilseit irgendeines Abschnittes des Bandes (8) in dem Halteofen (3) unter 220 Sekunden und vorzugsweise unter 190 Sekunden liegt.
  12. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Beschichtungsbad (6) ein Gemisch aus Aluminium und Silizium mit höchstens 11 % Silizium ist.
EP91401890A 1990-07-16 1991-07-08 Verfahren zum Feuertauchbad-Aluminieren eines ferritischen Edelstahlbandes Expired - Lifetime EP0467749B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9009048A FR2664617B1 (fr) 1990-07-16 1990-07-16 Procede de revetement d'aluminium par trempe a chaud d'une bande d'acier et bande d'acier obtenue par ce procede.
FR9009048 1990-07-16

Publications (2)

Publication Number Publication Date
EP0467749A1 EP0467749A1 (de) 1992-01-22
EP0467749B1 true EP0467749B1 (de) 1994-10-26

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EP91401890A Expired - Lifetime EP0467749B1 (de) 1990-07-16 1991-07-08 Verfahren zum Feuertauchbad-Aluminieren eines ferritischen Edelstahlbandes

Country Status (8)

Country Link
US (1) US5358744A (de)
EP (1) EP0467749B1 (de)
JP (1) JP3285893B2 (de)
AT (1) ATE113322T1 (de)
DE (1) DE69104789T2 (de)
DK (1) DK0467749T3 (de)
ES (1) ES2064945T3 (de)
FR (1) FR2664617B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037254A1 (de) 2010-08-31 2012-03-01 Thyssenkrupp Steel Europe Ag Verfahren zum Schmelztauchbeschichten eines Stahlflachprodukts
WO2013117273A1 (de) 2012-02-08 2013-08-15 Thyssenkrupp Steel Europe Ag Verfahren zum schmelztauchbeschichten eines stahlflachprodukts

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KR0166099B1 (ko) * 1992-02-12 1999-01-15 코가 노리수케 내식성이 우수한 알루미늄-규소-크롬계 도금강판 및 그 제조방법
FR2692596B1 (fr) * 1992-06-22 1995-03-31 Lorraine Laminage Tôle revêtue et procédé de fabrication de cette tôle.
US5447754A (en) * 1994-04-19 1995-09-05 Armco Inc. Aluminized steel alloys containing chromium and method for producing same
FR2720079B1 (fr) * 1994-05-19 1996-06-21 Lorraine Laminage Procédé de revêtement d'aluminium par trempe à chaud d'une pièce, notamment d'une bande, en acier contenant au moins 0,1 % en poids de manganèse, notamment en acier inoxydable et/ou allié.
FR2807069B1 (fr) 2000-03-29 2002-10-11 Usinor Tole en acier inoxydable ferritique revetue utilisable dans le domaine de l'echappement d'un moteur de vehicule automobile
KR101105986B1 (ko) * 2004-04-29 2012-01-18 포스코강판 주식회사 가스 분압비 조절을 통하여 도금조건을 제어하는용융알루미늄 도금 스테인레스 강판의 제조방법
AT500686B1 (de) * 2004-06-28 2007-03-15 Ebner Ind Ofenbau Verfahren zur wärmebehandlung eines metallbandes vor einer metallischen beschichtung
US20090123651A1 (en) * 2005-10-14 2009-05-14 Nobuyoshi Okada Continuous Annealing and Hot Dip Plating Method and Continuous Annealing and Hot Dip Plating System of Steel sheet Containing Si
JP2011224584A (ja) * 2010-04-16 2011-11-10 Jfe Steel Corp 熱延鋼板の製造方法及び溶融亜鉛めっき鋼板の製造方法
WO2012115291A1 (en) * 2011-02-23 2012-08-30 Posco Coated & Color Steel Co., Ltd. Method for manufacturing hot dip plated steel
KR20150084051A (ko) * 2012-12-04 2015-07-21 제이에프이 스틸 가부시키가이샤 연속 용융 아연도금 강판의 제조 설비 및 제조 방법
WO2018169830A1 (en) * 2017-03-13 2018-09-20 The Regents Of The Universtiy Of California A method of producing pre-lithiated graphite from recycled li-ion batteries
JP6753369B2 (ja) * 2017-06-29 2020-09-09 Ｊｆｅスチール株式会社 溶融Ｚｎ系めっき鋼板及びその製造方法
KR102521021B1 (ko) * 2018-03-08 2023-04-12 상라오 징코 솔라 테크놀러지 디벨롭먼트 컴퍼니, 리미티드 태양 전지 패널용 플럭스 도포 부재 및 방법, 그리고 태양 전지 패널의 인터커넥터 부착 장치
KR102094127B1 (ko) * 2018-07-31 2020-03-27 부산대학교 산학협력단 딥코팅 장치 및 딥코팅 방법
KR20210055508A (ko) 2019-11-07 2021-05-17 포스코강판 주식회사 용융 알루미늄 도금 페라이트계 스테인리스 강판의 미도금 방지를 위한 Fe-P 선도금 용액 및 선도금 방법
CN111979577B (zh) * 2020-09-15 2023-10-31 连城凯克斯科技有限公司 硅单晶四爪等力矩在线抓取装置

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US4675214A (en) * 1986-05-20 1987-06-23 Kilbane Farrell M Hot dip aluminum coated chromium alloy steel
JPS6428351A (en) * 1987-07-23 1989-01-30 Nisshin Steel Co Ltd Method for hot dip aluminizing hardly aluminizable steel sheet
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037254A1 (de) 2010-08-31 2012-03-01 Thyssenkrupp Steel Europe Ag Verfahren zum Schmelztauchbeschichten eines Stahlflachprodukts
WO2012028465A1 (de) 2010-08-31 2012-03-08 Thyssenkrupp Steel Europe Ag Verfahren zum schmelztauchbeschichten eines stahlflachprodukts
DE102010037254B4 (de) * 2010-08-31 2012-05-24 Thyssenkrupp Steel Europe Ag Verfahren zum Schmelztauchbeschichten eines Stahlflachprodukts
US9279175B2 (en) 2010-08-31 2016-03-08 Thyssenkrupp Steel Europe Ag Method for hot dip coating a flat steel product
WO2013117273A1 (de) 2012-02-08 2013-08-15 Thyssenkrupp Steel Europe Ag Verfahren zum schmelztauchbeschichten eines stahlflachprodukts
US9803270B2 (en) 2012-02-08 2017-10-31 Thyssenkrupp Steel Europe Ag Method for hot-dip coating of a steel flat product

Also Published As

Publication number Publication date
JP3285893B2 (ja) 2002-05-27
FR2664617B1 (fr) 1993-08-06
US5358744A (en) 1994-10-25
ES2064945T3 (es) 1995-02-01
ATE113322T1 (de) 1994-11-15
DE69104789T2 (de) 1995-03-16
EP0467749A1 (de) 1992-01-22
DE69104789D1 (de) 1994-12-01
FR2664617A1 (fr) 1992-01-17
DK0467749T3 (da) 1995-04-03
JPH04232238A (ja) 1992-08-20

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